Void contracts can occur when one of the involved parties is incapable of fully comprehending the implications of the agreement. ... For example, a contract between an illegal drug supplier and a drug dealer is unenforceable from the onset due to the illegal nature of the agreed-upon activity.

Is a void contract always unenforceable?

In contrast, a void contract is inherently unenforceable. A contract may be deemed void should the terms require one or both parties to participate in an illegal act, or if a party becomes incapable of meeting the terms as set forth, such as in the event of one party's death.

Why would a contract be unenforceable?

A contract can be declared unenforceable if a court is convinced that coercion was used to facilitate the signing. An example would be if blackmail was used as leverage to facilitate the contract. Courts can also declare a contract unenforceable when one of the parties to the contract has undue influence on the other.